<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>

<body>
<div></div>
<script>
    console.log(location.search); // ?uname=andy
    // 1.先去掉？  substr('起始的位置'，截取几个字符);
    var params = location.search.substr(1); // uname=andy
    console.log(params);
    // 2. 利用=把字符串分割为数组 split('=');
    var arr = params.split('=');
    console.log(arr); // ["uname", "ANDY"]
    var div = document.querySelector('div');
    // 3.把数据写入div中
    div.innerHTML = arr[1] + '欢迎您';
</script>
</body>

</html>
